Audio speaker



FIG. 1 is a front perspective view showing our new design for an audio speaker;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a right side elevation view thereof, the left side elevation being a mirror image thereof. 

CLAIM The ornamental design for an audio speaker, as shown and described. 